On a side note, this should be a great weekend to be at the park. Great weather expected. Don't know if you've been there before, but one of my favorite spots is the natural bridge on the Eagle Point Trail.
Natural Bridge (Google Maps) Zoom in, and the trail is clear. You can also make out the bench on top of the bridge.
A little south of there, the trail cross a creek. Divert east down the creek, and you'll find places where the creek has carved into hard layers of gypsum, called alabaster gypsum. I think it is fascinating stuff.
Alabaster gypsum